Platform Independency

Java is called as a platform Independent language, as when compiled it generates a class file which is in byte code. What is this byte code, what is the importance of this bytecode? And if by using this technique one can implement platform independency, why it is not getting implemented for all languages? Can any one please clear my doubts....

To run a Java program, you need a JVM -- a "Java Virtual Machine". This is basically a simulation of an imaginary computer. The "machine language" of this imaginary computer is Java bytecode. This lets the same program -- the same bytecode -- run on any real computer for which a JVM has been implemented. It's actually an old technique, and has been implemented for many other languages. The newest version is Microsoft's CLI, Common Language Interface (Infrastructure?), the core of .NET .

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